<!DOCTYPE html>
<html lang="zh">
<head>
	<meta charset="UTF-8" />
	<meta name="viewport" content="width=device-width, initial-scale=1.0" />
	<meta http-equiv="X-UA-Compatible" content="ie=edge" />
	<title>选项卡</title>
	<link rel="stylesheet" type="text/css" href="css/index.css"/>
	<script src="js/index.js" type="text/javascript" charset="utf-8"></script>
</head>
<body>
	<div id="div1">
		<input class="active" type="button" value="1" />
		<input type="button" value="2" />
		<input type="button" value="3" />
		<ul>
			<li class="show">a</li>
			<li>b</li>
			<li>c</li>
		</ul>
	</div>
</body>
</html>